On the optimal guidance for planar Lunar ascent

Optimal Trajectory Planning for the Apollo Moon Landing: Descent, Ascent, and Aborts

This paper presents optimal trajectory solutions for guiding the Apollo Lunar Excursion Module (LEM) to and from the Moon’s surface. GPOPS− II was used to solve the nonlinear control problem, providing full state and control histories for optimal ascent, descent and abort scenarios. Although historically Apollo did not follow an optimal trajectory due to terrain and navigation constraints, the ...

Optimal Guidance for Lunar Module Soft Landing

In this paper, we consider an optimal control problem arising from the optimal guidance of a lunar module to achieving soft landing, where the description of the system dynamics is in a three-dimensional coordinate system. Our aim is to construct an optimal guidance law to realize the soft landing of the lunar module with the terminal attitude of the module to be within a small deviation from b...

Time Optimal Closed - Loop Fuzzy - Control Strategy for Nonlinear Lunar Lander Mission

Optimal Sliding-Mode Guidance Law for Fixed-Interval Propulsive Maneuvers

An optimal strategy based on minimum effort control and also with terminal positionconstraint is developed for an exoatmospheric interceptor with a fixed- interval guidance time. It isthen integrated with sliding-mode control theory to drive an optimal sliding-mode guidance law forfixed-interval guidance time. In addition, this guidance law is generalized for intercepting anarbitrarily time-var...

Design of optimal central guidance of an underwater vehicle in the modeled ship wake

The purpose of this paper is to provide a new algorithm for guidance of an underwater vehicle to reach its target, and demonstrate its effectiveness by simulation with a computer code. The meant of target in here is to chase a ship on the surface of the water. In order to do this, one of the most effective methods is to follow the ship wake which produced behind it. Disadvantages of wake guidan...